Knowledge of anti-static packaging bag

　　Anti static packaging bag is a packaging bag made of anti-static materials, also known as anti-static shielding bag. It can not withstand static electricity and can shield external static electricity. It is often used to package sensitive devices that are sensitive to static electricity and easy to be damaged by static electricity.

　　classification

　　It can be divided into two categories: one is composed of substrate, metal coating and heat sealing layer. It has double functions of "no static electricity" and shielding external static electricity.

　　2、 PE anti-static plastic bag has the characteristics of simple production process and low production cost.

　　Technical indicators

　　1. Surface resistivity of inner layer: 105-1010 (/sq), which is superior to the requirements of internal layer 105-1012 (/sq) specified in the national military standard.

　　2. External surface resistivity: less than 108 (/sq), superior to the requirement that the external surface resistivity is less than 1012 (/sq) specified in the national military standard.

　　3. Electrostatic attenuation: 0.05 seconds, superior to the requirement of 2 seconds specified in the national military standard.

　　Other properties: electromagnetic interference attenuation, puncture resistance, water vapor permeability, etc. It is superior to the requirements of national military standards.

　　test method

　　One is the external resistance test method. The external surface resistivity is less than 1.01012. This method can only test the external resistance of the inner and outer layers of the anti-static packaging bag, which is 1.0105~1.01012. It is not a test on the shielding layer of the anti-static packaging bag, so the test results cannot reflect the electrostatic shielding performance of the anti-static packaging bag, and there are differences between the test results and the shielding performance test requirements.

　　The second is the electrostatic induction peak voltage test method, which measures the external resistance with the measured peak voltage as the indicator, and identifies the quality of materials by measuring the external resistance of the data.

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